Vehicle seat back cushion



FIG. 1 is a top left perspective view of a vehicle seat back cushion;

FIG. 2 is a top right perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof. 

CLAIM The ornamental design for a vehicle seat back cushion, as shown and described. 